Hello mumant and welcome to mobileread!
I was about to suggest, that you have a look at adb, but you figured this out yourself.
Thanks for your question and your link, as this was one of the issues, I had on my list as well. Using JoikuSpot Premium on an E52 here and got it working now.
One thing for you - it is not written in the instructions, but the guy does it in his (slightly chaotic) video, actually: You have to copy one file to the reader first, in order to make these instructions work:
Copy
wpa_supplicant into the root directory of READER, while your T1 is connected in data transfer mode (opposed to USB debugging mode). If you copy it anywhere else, the instructions won't work.
You did update your busybox, which is certainly good. If you still run into error messages (command not known; happened to me with
cp), try
I got this working even without ADB. All it needs doing is copying this one file and then submitting the commands. if you do this through the terminal on the reader or ADB or ssh does not matter, actually.
It now works, but only with unsecured network (not that WEP means any security nowadays), so i won't use this in crowded places. But at least my T1 now recognises my mobile hotspot and can connect, if desperately needed.
Hope this helps. I'm gonna put a short summary into the wiki.